Potential latitudinal variation in egg size and number of a geographically widespread reef fish, revealed by common-environment experiments

Kokita, Tomoyuki

doi:10.1007/s00227-003-1104-x

Cited by 57 publications

(62 citation statements)

References 32 publications

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“…along the Japanese coast, temperature was also reported to be positively correlated with fecundity and negatively correlated with egg size for Engraulis japonicus (Funamoto and aoki, 2002), indicating the existence of a trade-off between fecundity and egg size, and that temperature probably modifies the energy levels dedicated to reproduction. this phenomenon was also seen in a different type of fish species: three Pomacentrus coelestis populations distributed in reefs along Japan's Pacific coast showed increased egg numbers and decreased egg sizes with higher sea temperatures (Kokita, 2003).…”

Section: Oocyte Size and Environmental Conditionsmentioning

confidence: 72%

“…However, in this case the oocyte volume was not correlated with female size within each population. these results, according to Kokita (2003), indicate that the effect of female size difference between populations can be ignored as a covariate to explain oocyte size variability between the two areas. in the literature, the relationship between female size and oocyte size in other small pelagic fish is not clear cut.…”

Section: Statistical Analysesmentioning

confidence: 74%

“…the differences in oocyte size between populations found in the present study were 95% (2002), 66% (2003), and 30% (2004), and were thus in the middle of the range reported by llanosrivera and Castro (2004) for planktonic eggs. Variability in egg size has been described by several authors for diverse fish species that are distributed over wide geographic ranges or are exposed to divergent environmental conditions (de Ciechomski, 1973;tanasichuk and Ware, 1987;beacham and Murray, 1993;duponchelle et al, 2000;Funamoto and aoki, 2002;Kokita, 2003). batch fecundity, estimated from all female sizes sampled, was also significantly different between areas, with higher values for the northern females than for the southern ones.…”

Section: Statistical Analysesmentioning

confidence: 81%

“…4). in 2002, the mean oocyte volume was 95% larger in south Chile females (table 1); this difference decreased to 66% in 2003 and30% in 2004 (Fig. 5).…”

Section: Statistical Analysesmentioning

confidence: 86%

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Variabilidad en el tamaño de ovocitos y fecundidad parcial de anchoveta (<i>Engraulis ringens</i>,

2008

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suMMarY: utilising histological preparations of ovaries from Engraulis ringens females collected in two contrasting spawning habitats along the Chilean coast, we assess the variability in oocyte size and batch fecundity during the peak spawning seasons in three years. the effects of female size (length and weight), batch fecundity and mean sea surface temperature on oocyte size were also examined. results showed larger oocytes and lower batch fecundity in females from the southern area. oocyte volume differences persisted inter-annually and were not explained by differences in female sizes. since ovary weight was similar between areas, the cost of producing larger oocytes in the south population seems to be a fecundity reduction. the latitudinal variations in oocyte number and size seem to be determined by the predominant environmental conditions in each habitat. Hence, female E. ringens seem to adapt their reproductive tactics by producing eggs sizes and quantities that favour survival of their offspring under the environmental conditions in which they are to develop.Keywords: oocyte size, inter-population variations, Humboldt Current, small pelagic, egg size, latitudinal variations. rEsuMEn: Variabilidad en el tamaño de ovocitos y fecundidad parcial de anchoveta (Engraulis ringEns, Jenyns 1842) en dos áreas de desove de la costa de Chile. -utilizando preparaciones histológicas de ovarios de anchovetas (Engraulis ringens) colectadas en dos hábitats contrastantes a lo largo de la costa de Chile, se estudia la variabilidad en tamaño de ovocitos y fecundidad parcial en la estación de máximo desove durante tres años. los efectos de tamaño de hembra (longitud total y peso total), fecundidad parcial y temperatura superficial del mar sobre el tamaño de los ovocitos, también fueron investigados. los resultados mostraron ovocitos más grandes y menor fecundidad en hembras de la zona sur. las diferencias en volumen de ovocitos persistieron inter-anualmente y no fueron explicadas por diferencias en el tamaño de las hembras. dado que los pesos de los ovarios fueron similares entre zonas, el coste de producir ovocitos más grandes en la población del sur sería la reducción en la fecundidad. las variaciones latitudinales en número y tamaño de ovocitos parecen ser determinadas por las condiciones ambientales predominantes en cada hábitat de desove. de este modo, las hembras de E. ringens adaptarían sus tácticas reproductivas produciendo tamaño y cantidades de huevos que favorezcan la supervivencia de sus descendientes a las condiciones ambientales en las que se desarrollarán.Palabras clave: tamaño de ovocitos, variaciones inter-poblacionales, corriente de Humboldt, peces pelágicos pequeños, tamaño de huevo, variaciones latitudinales.Scientia Marina 73(1) March 2009, 59-66, barcelona (spain) issn: 0214-8358

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Section: Oocyte Size and Environmental Conditionsmentioning

confidence: 72%

Section: Statistical Analysesmentioning

confidence: 74%

Section: Statistical Analysesmentioning

confidence: 81%

“…4). in 2002, the mean oocyte volume was 95% larger in south Chile females (table 1); this difference decreased to 66% in 2003 and30% in 2004 (Fig. 5).…”

Section: Statistical Analysesmentioning

confidence: 86%

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Variabilidad en el tamaño de ovocitos y fecundidad parcial de anchoveta (<i>Engraulis ringens</i>,

2008

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“…For example, Atlantic cod Gadus morhua, displays CnGV in growth patterns similar to those of estuarine silverside fishes (Salvanes et al 2004). Two flatfish species, turbot and halibut, have also been shown to exhibit CnGV in growth , Jonassen et al 2000, and a reef fish, the neon damselfish, was found to show CnGV in egg size and number (Kokita 2003), although in these species mixing may be more limited compared to other oceanic fishes (Fairbairn 1981, Grant et al 1984, Diakov 1998, Foss et al 1998, Shulman 1998.…”

Section: Introductionmentioning

confidence: 99%

Absence of countergradient and cogradient variation in an oceanic silverside, the California grunion Leuresthes tenuis

Brown¹,

Baumann²,

Conover³

2012

Mar. Ecol. Prog. Ser.

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Spatial adaptations that maximize a species' fitness in its local environment, particularly in the form of countergradient variation (CnGV = genotypic influences counteract environmental effects on trait variation) and cogradient variation (CoGV = genotypic influences accentuate environmental plasticity), have been documented in many estuarine and anadromous fishes. However, their prevalence in more oceanic fishes, where extensive gene flow and reduced environmental selection may preclude local adaptation, remains unclear. If oceanic species lack genetic structure, they may be limited in their ability to adapt to global climate change. We examined the potential for adaptation in oceanic fishes by testing whether an oceanic silverside, the California grunion Leuresthes tenuis, displays CnGV in growth capacity and CoGV in vertebral number across a latitudinal gradient as found in estuarine silversides. Common garden experiments revealed that reaction norms for growth in response to temperature differed little among 3 L. tenuis populations from different latitudes. Growth rates of wild adult L. tenuis measured from scale analysis suggested that growth may be slightly faster at more southern latitudes, likely due to environmental variation. Mean vertebral number in wild L. tenuis, determined from radiographs, were nearly identical for all populations. Overall, our results did not provide evidence for spatial adaptations in these traits of L. tenuis, in contrast to the strong patterns of latitudinal trait adaptation in other, more estuarine silversides. This study provides support for the finding that higher gene flow levels and weaker environmental selection pressures of oceanic species limit local adaptation.

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References

2014

Reproductive Biology of Teleost Fishes

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Potential latitudinal variation in egg size and number of a geographically widespread reef fish, revealed by common-environment experiments

Cited by 57 publications

References 32 publications

Variabilidad en el tamaño de ovocitos y fecundidad parcial de anchoveta (<i>Engraulis ringens</i>,

Variabilidad en el tamaño de ovocitos y fecundidad parcial de anchoveta (<i>Engraulis ringens</i>,

Absence of countergradient and cogradient variation in an oceanic silverside, the California grunion Leuresthes tenuis

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